51371731 has 8 divisors (see below), whose sum is σ = 53672400. Its totient is φ = 49106400.

The previous prime is 51371693. The next prime is 51371741. The reversal of 51371731 is 13717315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51371731 - 2¹³ = 51363539 is a prime.

It is a super-2 number, since 2×51371731² = 5278109491872722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51371731.

It is not an unprimeable number, because it can be changed into a prime (51371741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5841 + ... + 11698.

It is an arithmetic number, because the mean of its divisors is an integer number (6709050).

Almost surely, 2^51371731 is an apocalyptic number.

51371731 is a deficient number, since it is larger than the sum of its proper divisors (2300669).

51371731 is a wasteful number, since it uses less digits than its factorization.

51371731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17669.

The product of its digits is 2205, while the sum is 28.

The square root of 51371731 is about 7167.4075508513. The cubic root of 51371731 is about 371.7418020816.

The spelling of 51371731 in words is "fifty-one million, three hundred seventy-one thousand, seven hundred thirty-one".